now the top u.s. commander in afghanistan, general john allen is under investigation for alleged inappropriate communications with kelly. defense secretary leon panetta says he ordered an investigation of general alhelp on monday. the secretary who was a former cia director also talking about general petraeus' resignation. says, quote: , quote: general petraeus was scheduled to testify about at it cans in libya that killed four americans in september. some say they are skeptical of the timing of his resignation. >> it is not a coincidence to me. he is the one who probably knows most about what happened or didn't happen in benefit dpazy. if this is homing over his head when went to go brief the united states senate, did that influence the way, the direction and the story he he told. >> reporter: a pentagon official says 20,000 to 30,000 pages of edmonton mail and other documents are now under review. -- he is the one who probably knows more most about what happened or didn't happen in benefit ghazi. if